<book>
?<person>
? <first>Kiran</first>
? <last>Pai</last>
? <age>22</age>
?</person>
?<person>
? <first>Bill</first>
? <last>Gates</last>
? <age>46</age>
?</person>
?<person>
? <first>Steve</first>
? <last>Jobs</last>
? <age>40</age>
?</person>
</book>
程序輸出
Root element of the doc is book
Total no of people: 3
First Name: Kiran
Last Name: Pai
Age: 22
First Name: Bill
Last Name: Gates
Age: 46
First Name: Steve
Last Name: Jobs
Age: 40
程序清單
import java.io.File;
import org.w3c.dom.Document;
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class ReadAndPrintXMLFile{
??? public static void main (String argv []){
??? try {
??????????? DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
??????????? DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
??????????? Document doc = docBuilder.parse (new File("book.xml"));
??????????? // normalize text redivsentation???????????
??????????? doc.getDocumentElement ().normalize ();
??????????? System.out.println ("Root element of the doc is " + doc.getDocumentElement().getNodeName());
??????????? NodeList listOfPersons = doc.getElementsByTagName("person");
??????????? int totalPersons = listOfPersons.getLength();
??????????? System.out.println("Total no of people : " + totalPersons);
??????????? for(int s=0; s<listOfPersons.getLength() ; s++){
??????????????? Node firstPersonNode = listOfPersons.item(s);
??????????????? if(firstPersonNode.getNodeType() == Node.ELEMENT_NODE){
??????????????????? Element firstPersonElement = (Element)firstPersonNode;
??????????????????? //-------???????????????????
??????????????????? NodeList firstNameList = firstPersonElement.getElementsByTagName("first");
??????????????????? Element firstNameElement = (Element)firstNameList.item(0);
??????????????????? NodeList textFNList = firstNameElement.getChildNodes();
??????????????????? System.out.println("First Name : " +
?????????????????????????? ((Node)textFNList.item(0)).getNodeValue().trim());
??????????????????? //-------???????????????????
? ????????????????? NodeList lastNameList = firstPersonElement.getElementsByTagName("last");
??????????????????? Element lastNameElement = (Element)lastNameList.item(0);
??????????????????? NodeList textLNList = lastNameElement.getChildNodes();
??????????????????? System.out.println("Last Name : " +
?????????????????????????? ((Node)textLNList.item(0)).getNodeValue().trim());
??????????????????? //----???????????????????
??????????????????? NodeList ageList = firstPersonElement.getElementsByTagName("age");
??????????????????? Element ageElement = (Element)ageList.item(0);
??????????????????? NodeList textAgeList = ageElement.getChildNodes();
??????????????????? System.out.println("Age : " + ((Node)textAgeList.item(0)).getNodeValue().trim());
??????????????????? //------
??????????????? }//end of if clause
??????????? }//end of for loop with s var
??????? }
??????? catch (SAXParseException err) {
?????????????? System.out.println ("** Parsing error" + ", line "
???????????? ???????????????????????????? + err.getLineNumber () + ", uri " + err.getSystemId ());
?????????????? System.out.println(" " + err.getMessage ());
??????? }
??????? catch (SAXException e) {
??????????????? Exception x = e.getException ();
??????????????? ((x == null) ? e : x).printStackTrace ();
??????? }
??????? catch (Throwable t) {
??????????????? t.printStackTrace ();
??????? }
??????? //System.exit (0);
??? }//end of main
}
作者簡介: Kiran Pai，4～5年的開發經歷，22歲
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